﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bai05
{
    class Rectangle
    {
	    int width, height;
         public Rectangle(int a ,int b)
            {
                 width = a;
                    height = b;
             }
	    public int area()
        {
            return (width * height);
         }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Rectangle recta= new  Rectangle(3, 4);
            Rectangle rectb = new  Rectangle(5, 6);
	        Console.WriteLine("recta:{0}", recta.area());
            Console.WriteLine("rectb:{0}", rectb.area());
	        
        }
    }
}
